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Intermittent blower operation on Goodman AC/heat pump-outside unit comes on -sometimes blower does-sometimes not-can switch Tstat off then on and blower will operate

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I believe this to be either a bad, miswired, or loose connections on the thermostat or thermostat wires. If this is not the problem then a bad circuit board is probably your issue. A licensed technician can use a amp meter and multi meter to trace this problem. Good Luck.

Posted on Jun 25, 2008

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GOODMAN AIR HANDLER, FAN AND HEAT STRIP COME ONLINE WITHOUT DEMAND. WON'T TURN OFF BY TSTAT


the w wire off thermosta controls heat. eithe bad board or thermostat.

Feb 01, 2013 | Goodman Heating & Cooling

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I have a goodman cpk j42 -1b ac unit on the outside and a central heat and air unit inside. the ac unit come on and runs fine but when it hit the temp the thermastat clicks and the fan outside goes of but...


Hello BWOOD Check the thermostat FAN button is in AUTO position not ON position.That might be it .The relay is in the blower unit but they RARELY become frozen/welded stuck on.

Aug 30, 2010 | Heating & Cooling

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Furnace won't start or air condition only fan


Since you have fan operation,via fan on position, your high and low voltages are present. I would take the thernostat face off and jumper red to white for heat, if it works , the tstat is bad, same with red to yellow, if AC outside comes on.

Apr 18, 2010 | Goodman GMS80903BNA Heater

1 Answer

Split straight air system with outside unit comes on and air handler does not whether on auto or on position with temp down or up


Either the thermostat, fan relay on circut board or blower motor bad. Jumper the R and G terminals together on the circut board, depress the door switch and see if the blower runs, if not, check for power to motor, capacitor and motor windings. If it runs then you have tstat/control voltage wiring problem.

Jul 26, 2009 | Goodman Heating & Cooling

1 Answer

CONNECT AC TO AIR HANDLER


Wire tstat normaly> Take the Y off the tstat and it goes to the outside unit. The other wire from the outside init goes to the common off the transformer. This is marked with blue,brown or black. Russ

Jul 23, 2009 | Goodman Heating & Cooling

1 Answer

Inside blower not starting every time


You have a voltage bleed somewhere or a short, whatever you want to call it. Do you have a control board on this unit where the relays are integrated into it or do you have the old type where the relay is separate? Anyway, you need to take a meter and take voltage readings to the motor when it's acting up and when it's running right. I have had the same problem with a Goodman unit before and it turned out to be the tstat! What I would do is remove the cover off the tstat and take a small jumper wire and touch the r terminal to the y terminal. If the motor starts right up, you know it's the tstat. If you have the same problem, then the only thing it can be is a low voltage short to the unit from the tstat, bad control board if you have one, or a bad relay. But if the unit is working fine in heat, it's probably not the relay. I hope this helps.

Apr 08, 2009 | Goodman Heating & Cooling

1 Answer

I have a Rudd ubha and have been using the emergency heat for a couple weeks because the aux. heat won't work. Now I need the A.C. but the unit outside won't turn on. We replaced the control panal and it...


Did you replace the defrost board out in the outside unit? Or did you replace the control board just on the airhandler? You need to check if the board outside is functioning. Also, put the unit in cool and check to see if the outside unit is being called to come on. What could of happened is the unit was the compressor went out and that's why it didn't work in Aux. and only in emergency. I would just recommend checking the outside for issues since the inside unit is operating in emer. It could possibly be the tstat also. Just buy a tstat for a heat pump and follow the instructions. The key is to label your wires with what color is going to what terminal (r,w,g,o,y etc...) and then use the new tstat instructions. Better yet, buy the same brand t-stat. Hope this helps.

Apr 04, 2009 | Ruud UBHC Air Conditioner

1 Answer

We recently bought a new house (to us). It has a Goodman heat pump and Goodman Electric backup furnace(A36-15) with a Janitrol stat. I switched the stat to emrg. Heat when the temp got below...


If you have a volt meter, check to see if you have 24 volts coming from the thermostat on the yellow wire.

If you do, and it is set on emer heat, you have a bad T-stat.


It looks like it is wired properly.

If you have no meter, you could try changing the stat, I reccomend Honeywell or white rodgers.

Let me know if you eliminate the Tstat as the problem and we can go from there.
Chances are its the stat.

Dec 06, 2008 | Heating & Cooling

1 Answer

Need line set size for goodman ck-36-1a


If your running gas heat it's 5/8 3/8 tubing.If it's elec. heat it's 3/4 3/8 tubing. Etheirway 3/4 3/8 works for both. Use 6 wire for tstat from tstat to furnace or air handler, and you need is 2 wire from condensing unit [outside] to furnace or air handler or anything more than two.

Sep 26, 2008 | Goodman Heating & Cooling

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